Adhesive and process of making same.



UNITED STATES PATENT CFEICE.

FREDERICK H. PATCH, OF RICHMOND, VIRGINIA.

ADHESIVE AND PROCESS OF MAKING SAME.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed April 14, 1905. Serial No. 255,539.

5 State of Vir inia, have invented certain new and useful fmprovementsin Adhesives and Processes of Making Same, of which the following is aspecification.

The object of my said invention is to utilize the waste liquor frompulp-mills or from the manufacture of fiber from any fibrous material,known as sulfite liquor, by making the same into an adhesive ofcommercial value. Many attempts have been made to made from evaporatedsulfite liquor absorb moisture when exposed to dampness and crumble,thus destroying the commercial value thereof.

My said invention consists, therefore, in combining sulfite liquor withoil for the purpose of preventing it from taking up moisture.

Oil in its natural state and sulfite will not combine; but I havediscovered that by com bining oil with another substance which willreduce the mixture to substantially the specific gravity of theevaporated sulfite liquor said mixture and the sulfite will combine andin a permanent manner. I have found that by mixing the oil with resinuntil the combination is of substantially the same specific gravity asthe sulfite the mixture will then combine with said sulfite and renderthe product impervious to moisture, and thus overcome the objectionabove noted. In

' practice I combine the several ingredients by heat; but they may becombined by allowing them to stand until all are thoroughly dissolved.Heating the mixture is the pre ferred way, however, and may be done withsteam, in a vacuum-pan, or by direct heat. The oils used may be anysuitable mineral or animal oil, and in practice I have found linseed oilto give very satisfactory results. Other oils may, however, be used, andother substances than resin may be found to serve as its equivalent. Icombine said several substances in substantially the proportions utilizesaid waste, but all products heretofore and in the manner as follows:four pints of evaporated sulfite liquor, one pint of oil, and twelveounces of resin. The oil and resin are first mixed, as above stated, theresin being melted by heat or dissolved in the oil, and then the mixtureis combined with the sulfite, preferably also under heat.

A very effective and inexpensive adhesive compound is thus produced,suitable for use in making cores for castings and all other uses wherean adhesive is desired for binding sand together, and also in many otherplaces where such an adhesive maybe found useful. Thus a large quantityof Waste material heretofore found difficult to use to any advantage maybe saved and converted into a useful product of commercial value.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The process of making an adhesive from evaporated sulfite liquorwhich consists in combining therewith a mixture of oil and resin,substantially as set forth.

2. The process of making an adhesive from evaporated sulfite liquorwhich consists in mixing a quantity of resin with a quantity of oiluntil the mixture is of sub. stantially the same specific gravity as thesulfite and then mixing said mixture with said sulfite, substantially asset forth.

3. An adhesive composed of sulfite liquor combined with a mixture of oiland resin, substantially as set forth.

4. An adhesive consisting of a mixture of sulfite liquor, oil and resinin substantially the proportions set forth.

5. The process of treating evaporated sulfite liquor which consists inmixing therewith a quantity of oil, which has previously been combinedwith a substance that will combine with said sulfite, substantially asset forth.

In witness whereof I have hereunto set my hand and seal, at IVashington,District of Columbia, this 10th day of April, A. D. 1905.

FREDERICK H. PATCH. [L. 8.]

WVitnesses:

HAZEL NORDEMAN, E. WV. BRADFORD.

